Send 502 when all php-fpm workers are in use

[justink101]

Maxim,

If I set the php-fpm pool listen.backlog to 0, will this accomplish what I
want. I.e. fill up workers, once all the workers are used, fail requests.

Posted at Nginx Forum: http://forum.nginx.org/read.php?2,251476,251488#msg-251488